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2 protocols using ab175843

1

Immunohistochemical Analysis of Liver Cytochrome Enzymes

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Liver tissues were fixed with 4% paraformaldehyde solution, embedded in paraffin blocks and processed by immunohistochemistry staining. Tissue sections were deparaffinized and rehydrated using a graded ethanol series and distilled water, and then treated with 3% H2O2 in methanol for 30 min to block endogenous peroxidase activity. Tissue sections were then rinsed twice for five minutes in phosphate-buffered saline (PBS) and incubated with 10% normal goat serum for 30 min to block non-specific antibody binding. After washing, the samples were incubated with primary antibodies against CYP7A1 (Abcam, ab234982, 1:500), CYP8B1 (Abcam, ab175843, 1:50), CYP27A1 (Abcam, ab126785, 1:250), and CYP7B1 (Abcam, ab175889, 1:100). Sections were then washed in PBS three times and incubated with secondary antibodies. The sections were stained with DAB according to the manufacturer’s protocol, mounted on slides, and photographed using a digital microscope camera (Nikon, Tokyo, Japan). The immunohistochemistry sample images were quantified using Image-Pro Plus software (Media Cybernetics, MD, USA).
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2

Western Blot Protocol for Protein Detection

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Whole cell lysates were derived from cells or tissues using radioimmunoprecipitation assay (RIPA) lysis buffer. Proteins (20–40 μg) with SDS-loading buffer were loaded onto gels and run on SDS-PAGE; then, proteins were transferred to the polyvinylidene fluoride (PVDF) membrane. The PVDF membranes were incubated with primary antibodies against Pro-caspase-1 (1:2000, #ab179515, Abcam), caspase-1 (1:2000, #ab108362, Abcam), NLRP3 (1:2000, #ab16097, Abcam), IL-1β (1:1000, #AF-401-NA, R&D), HO-1 (1:500, #sc-10789, Santa Cruz), GAPDH (1:500, #sc-47724, Santa Cruz), β-actin (1:500, #sc-81178, Santa Cruz), Tubulin (1:1000, #556321, BD Pharmingen), FXRa (1:2000, #ab187735, Abcam), Cyp8b1 (1:2000, #ab175843, Abcam), Cyp27a1 (1:1000,#ab126785, Abcam), Sult2a1 (1:500, #sc-376629, Santa Cruz), Bsep (1:2000, #ab155421, Abcam), Mrp3 (1:500, #sc-5776, Santa Cruz), Ntcp (1:2000, #ab131084, Abcam), and BAAT (1:2000, #ab83882, Abcam). Then, appropriate horseradish peroxidase (HRP)-linked secondary antibodies were incubated for further 1 hour at room temperature. Luminal and H2O2 substrates were used for chemiluminescence detection.
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